Fig. 1: Phylogenetic tree of six prevalent and pathogenic genera of apicomplexan parasites that cause disease in humans and livestock.
From: A review of natural products as a source of next-generation drugs against apicomplexan parasites

The Apicomplexa phylum comprises over 6000 species, capable of infecting a broad range of hosts. These six genera and species are the focus for this review as they have a disproportionately large health and economic impact on the represented hosts compared with other apicomplexans and/or have a more developed history of clinical drug use in humans and livestock.